Bobbin-clutching means for rotatable spindles



March 13', 1928.-

J. A. MILLER BOBBIN CLUTCHING MEANS FOR ROTATABLE SPINDLES Filed Sept. 17. 1926 2 Sheets-Sheet 1,

lnvenTor. Joseph AMiH er b iw SAM/(M J. A. MILLER -BO BBIN CLUTGHING MEANS FOR ROTATABLE SPINDLES Filed Se i. 17, 1926 2 sheetyshe et 2 Fig.4.

lnvenTon Joseph-A. Miller MJIW Y3.

Patented Mar. 13, 1928.

, UNITED STATES Partner 1 OFFICE.

JOSEPH v.A. MILLER," OF HOPEDAIlE, MASSACHUSETTS, ASSIGNOR 'TO DRAIER COR- PORATION, OF HOPED'ALE, MASSACHUSETTS, A CORPORATION OF MAINE.

BOBBIN-CLUTCHING MEANS FOR 'ROTATAIBIlE SPINDLES.

Application filed September 17, 1926. Serial 1%. 136,044.

This invention relates to that type of spin dle employed in spinning frames and similar machines in 'which'bobbin clutching members are provided to fit within the base of 6 the bobbin and to expand therein thus to maintain the bobbin in position during the spinning or other operation.

It is the object of the present invention to provide a simple and eificient form of 'construotion which may be readily and economically manufactured, which will be subject to as little wear as possible, in which there shall be no parts likely to be broken or injured. under the. conditions to which the 16 mechanism is subject in use,.in which the pressure of the bobbin-clutching members shall be exerted symmetrically and evenly radially of the spindle, in which there shall be no sliding parts and in which the presence of lint or fly will not impair its operation. I

These and other objects and features of the invention will appear more fully from the accompanyingdescription and drawings and will be particularly pointed out in the claims.

As the general construction and operation of spinning and similarspindleswith bobbin clutching members are well known and familiar to those skilled in the art, itwill only 'be necessary here to illustrate and describe the parts directly concerned with j the present invention... It will be recognized that spindles operate at a very high rate of speed, are subject to the collection of more or less lint and fly thereon, and that the operation of placing and dofling the bobbins is performed by more or less careless 0perators. The construction must be such that the bobbin may be readily placed on and dofl'ed from the spindle and at the same time the construction must be such that the bobbin section on a. much enlarged scale of the construction shown in Fig. :1 with but one of the bobbin clutching members in place and with the parts in the position assumed when the bobbin is dolfed.

Fig. 3 is a view similar to Fig. '2 with the bobbin clutching member forced to the inward limit of its movement.

F1 4 IS, a side elevation of one of the bobbin 0 utching members such as shown in the preceding figures when in the position shown in Fig.2.: V Fig. 5' is aside elevation of one of the bobbin clutching members such as shown in the preceding figures when in the position shown in Fig. 3.

Flg. 6 .1s a top plan view corresponding to Fig. 5.

. Fig. 7 is a top plan view of the washer shown in Figs. 2 and 3.

Fig. 8 is aside elevation of a slightly diflerent form 'of bobbinclutching member standing in the unclutched or openposition. Fig. 9 is a view in vertical cross section of the construction shown in Fig. 8.

. Fig. 10 is a view in side elevation of the bobbin clutching member shown in Figs. 8

tical position. v

Fig. 11 is'a view in vertical cross section of the construction shown in Fig. '10.

In the preferred construction illustrated, the blade 1 of the'spindle is of the usual form and has rigidly secured thereto, preferably by being driven tightly thereon, a whirl 2 of the usual type. This whirl has rigidly secured thereto, preferably by a driving telescoping fit, a whirl cap 3 which preferably presents an upper flat surface 4 to receive the bobbin so that this cap itself preferably constitutes the bobbin rest. In the construction illustrated, the whirl cap 3 surroundsv and telescopes the upper end of the whirl and has a driving fit along the cylindrical surface 5. 4 V

The whirl is provided with an annular, and preferably flat, surface 6 extending transversely of, and surrounding,- the blade 1 and preferably located below the top of the whirl so as to form the bottom of. an annular recess in the upper end of the whirl concentric with the spindle blade.

.and'9 and standing in its innermost or ver- The bobbin clutching members are all of exactly similar construction and are disthe bobbinmayreadily he slipped. At its upper portion the arm is formed at 9 to present an upwardly projecting flange 10 cooperating with a depending flange 11 of a ferrule 12 driven on 01' secured to the blade 1. .The cooperating flanges 10 and 11 limit the outward movement of the arms. This is a common feature of construction. The formation of the arm at'the portion '9 y serves also to weight the arm and thus to increase the clutching actionof the arm due to centrifugal force when the spindle is rotated. At its lower end the arm is provided with a sector-shaped foot 13 projecting outwardly from the arm and at an acute angle thereto.

The feet of the bobbin clutching members are seated on the surface 6 of the whirl and thebobbi'n clutching members are preferably maintained in symmetrical spaced relation by spacing pins l l'driven into the whirl.

' The whirl cap or bobbin rest 3 is provided with an annular dependin flange 15 located above, and spaced from, the feet 13 and extending' 'jbetween the arms 7 and the outer periphery of the feet. Preferably each foot at or near-its outer periphery is provided with an upwardly projecting rib 16, which also extends concentrically of the blade 1 and consequently of the flange 15.

. A resilientwasher formed of suitable resilientmetal is mounted between the whirl cap or bobbin rest and. the feet of the bobbin .the'feet 13. l The concave face 17, in the conclutching members. This washer, as shown in Figs. 2 and 3, and in Fig. 7 is preferably of concavo-convex form with the concave surface 17 uppermost. This washer engages on concentric lines the bottom ofthe flange 15 and the outer portions, or the rib 16,of

struction illustrated and preferably, engages the flange 15 on the whirl cap or bobbin rest and the convex face 18 engages the outer portionor the rib 16 on the feet of thebobbin clutching member. I

The parts thus described are assembled and driven together so that the resiliency of the washer reacting on an inner concentric line against the bottom of the flange 15 and on an outer concentric line against the V outer portions or the rib 16 of the feet acts to force the outer portions of the feet downwardly and consequently the upper ends of the bobbin clutching arms radially outward This bobbin clutchfrom the blade. This effect. is produced. by the distortion or resilient action of the washer. i

.In the construction. illustrated in the first six figures of the drawing, the bottom sur= faces 19'of the feet, as best seen 5,

present sectors of a common frusto-conical surface. Theoretically, therefore, such a bobbin clutching member rocks between the positions shown in Figs. 2 and 3 on a point 20 at the middle of the inner curved edge of the foot. i

In the construction illustrated in Figs/8 on. the two end corners 24 0f the inner curved edge and each member, when in its outermost position, as shown in Figs. 8 and 9, has the bottom surface: of the foot seated through-. out onthe surface of the whirl. i J

In either of the constructions illustrated,

theforce due to the distortion of the washer, which may be either in distorting it from its generally fiatform or restoringrit from a distorted form to its generally flat ;form,-is

bin clutching members. radially outward.

but in addition, when the spindle is running,

the force due to centrifugal action comes into play to augment theiclutching action and this centrifugal force is increased bea cause of the weighted upper portions ofthe bobbin clutching arms. i a

Having thus described the invention, what is .claimedas new, and desired tobe secured by Letters Patent, iszf" a whirl secured to the blade, and presenting an annular surface transversely of, and surrounding, the blade, aplurality of bobbin tending up alongside the blade and a. sectorshaped foot projecting outwardly from, and

1. A rotatable spindle. comprising a blade, i

engaging on concentric lines the bottom .of y

said flange and the outer. portions of. said feet, the resiliency of the washer reacting against the flange and the outer portions of said feet to force the upper ends of. the bobbin clutching the blade;

2. A rotatable spindlecomprising blade,

a whirl secured to the blade, and presenting an annular surface transversely 10 ,andsurarms radially outward from-.

the main force utilizedrin swinging the bob- 110 clutching. members each having an arm exrounding, the blade, a plurality of bobbin clutching members each having an arm extending up alongside the blade with the upper portion thereof weighted to increase the clutching action due to centrifugal force and each having a sector-shaped foot projecting outwardly from, and at an acute angle to, the arm and seated on the said annular surface, the outer portions of the said feet being each provided with an mp wardly projecting rib extending concentrically of the blade, an annular whirl cap surrounding and spaced from said arms and secured to the whirl and having an annular depending flange located above and spaced from the feet between the armsand the upwardly projecting rib on the feet, anda engaging the upwardly projecting rib on the feet on concentric lines,the resiliency ofthe washer reacting against the said depending flange and the'said upwardly projecting rib to force the upper ends of the bobbin clutchin arms radially outward from the blade.

11 testimony whereof, I have signed my name to this specification.

JOSEPH A. MILLER. 

